Abstract
Brain–computer interface (BCI) provided a new communication channel based on the brain activities of the disabled patients. Visual-based P300 BCI is one of the most commonly used BCI systems. Usually, the stimulus used in visual-based P300 BCI was the same character or picture, which could make users feel bored or lose attention. Hence, it would be very helpful in improving the performance of visual-based P300 BCI by concentrating users’ attention on the target stimulus. In this study, a new paradigm using dynamic visual stimulation was presented to focus users’ attention. Three red dots in a honeycomb-shaped picture would shrink to the center of the honeycomb picture dynamically and were finally merged in the center position as one red dot, which was used as stimulus to evoke event-related potentials (ERPs). Six healthy subjects (three male, aged 24 ± 2.4) participated in this study. To verify the performance of this new paradigm, the face stimulus paradigm was used for comparison. The results showed that the dynamic contraction paradigm obtained 5.0% higher average offline single-trial accuracies and 2.8% higher average online accuracies compared to the face paradigm. According to the reports from subjects, the new paradigm could help to concentrate their attention.
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Acknowledgments
This work was supported in part by the Grant National Natural Science Foundation of China, under Grant Nos. 91420302 and 61573142. This work was also supported by the Fundamental Research Funds for the Central Universities (WH1516018, 222201717006) and Shanghai Chenguang Program under Grant 14CG31.
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Qiu, Z., Jin, J., Zhang, H., Zhang, Y., Wang, B., Wang, X. (2018). A New Paradigm Based on Dynamic Visual Stimulation in BCI. In: Delgado-García, J., Pan, X., Sánchez-Campusano, R., Wang, R. (eds) Advances in Cognitive Neurodynamics (VI). Advances in Cognitive Neurodynamics. Springer, Singapore. https://doi.org/10.1007/978-981-10-8854-4_21
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DOI: https://doi.org/10.1007/978-981-10-8854-4_21
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